Dominik spen 1/4 of his money on 9 badges and 3 key chains. The cost of each badge was 1/2 the cost of each key chain. He bought some more key chains with 2/9 of his remaining money. How many key chains did Dominik buy altogether?

Guest Aug 12, 2022

#1**0 **

M==Total money

K==cost of 1 key chain.

1/2*9K + 3K ==1/4M

7.5K == 1/4M

K==M / 30 - price of 1 key chain

2/9 * 3/4M ==1/6M - what he spent on buying additional key chains.

1/6M / [M / 30] ==1/6 x 30==5 additional key chains he putchased

**3 + 5 ==8 total number of key chains he purchased.**

Guest Aug 13, 2022